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An all-fibre PM MOPA pumped high-power OPO at 3.82microns based on large aperture PPMgLN
Dejiao Lin1, Shaif-ul Alam1, Yonghang Shen2, Tao Chen2 and David J.Richardson1
1. Optoelectronic Research Centre, University of Southampton, UK
2. State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China
We report a large aperture PPMgLN based OPO generating 21W of average output power at a slope efficiency of 45%, pumped by the output from a polarization maintaining Ytterbium doped fiber MOPA operating at 1060nm producing 58W of average output power and 20ns pulses at a repetition rate of 100kHz. A maximum of 5.5W of optical power was recorded at the idler wavelength of 3.82μm without thermal roll-off. We have experimentally verified that the pulse rise/fall time plays a significant role in the OPO conversion efficiency and that further enhancement in the OPO conversion efficiency will be possible using sub-nanosecond rise and fall times.
SPIE Photonics West 2012 San Francisco 21-26 Jan (2012)
Copyright University of Southampton 2006